Utilize este identificador para referenciar este registo: https://hdl.handle.net/10216/104030
Autor(es): M. J. Ferreira
Manuel Fonseca Almeida
Sílvia C. Pinho
A. Neves
Título: Alternative treatments for footwear industry liquid effluents. Part 2 Pressure wet oxygen oxidation
Data de publicação: 2002
Resumo: Small volumes of non-biodegradable liquid effluents are generated in footwear finishing operations. These effluents must be treated to meet regulatory requirements before discharge. Coagulation/flocculation followed by carbon adsorption may allow the discharge of the final effluent to sewage systems but the sludge produced and the adsorbent required makes the process of doubtful feasibility. Even with this treatment, threshold values for discharging the effluent to surface waters are not achieved. Such limitations encountered with these more conventional treatments pushed the research towards other less conventional options. One of them is wet oxidation (WO) here studied with oxygen as the selected oxidant. Thus, experiments were carried out to evaluate the influence of temperature, time, oxygen and pH on the reduction of effluent chemical oxygen demand (COD). In addition, the catalytic effect of copper sulphate on the WO treatment efficiency was evaluated. The WO treatment of these wastewaters using oxygen as oxidant requires at least 200 °C, 30 minutes and non-alkaline pH, preferably pH2. The catalytic effect of copper is only small thus its role is not of interest for this purpose.
Assunto: Ciências Tecnológicas, Outras ciências da engenharia e tecnologias
Technological sciences, Other engineering and technologies
Áreas do conhecimento: Ciências da engenharia e tecnologias::Outras ciências da engenharia e tecnologias
Engineering and technology::Other engineering and technologies
URI: https://hdl.handle.net/10216/104030
Tipo de Documento: Artigo em Revista Científica Internacional
Condições de Acesso: restrictedAccess
Aparece nas coleções:FEUP - Artigo em Revista Científica Internacional

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